diff --git a/ydb/core/tx/columnshard/engines/reader/plain_reader/constructor/constructor.cpp b/ydb/core/tx/columnshard/engines/reader/plain_reader/constructor/constructor.cpp
index 7a81b2bf2cbe..a3ea3e3ad4d3 100644
--- a/ydb/core/tx/columnshard/engines/reader/plain_reader/constructor/constructor.cpp
+++ b/ydb/core/tx/columnshard/engines/reader/plain_reader/constructor/constructor.cpp
@@ -24,7 +24,7 @@ NKikimr::TConclusion<std::shared_ptr<TReadMetadataBase>> TIndexScannerConstructo
         return std::shared_ptr<TReadMetadataBase>();
     }
 
-    if (read.GetSnapshot() < self->GetMinReadSnapshot()) {
+    if (read.GetSnapshot().GetPlanInstant() < self->GetMinReadSnapshot().GetPlanInstant()) {
         return TConclusionStatus::Fail(TStringBuilder() << "Snapshot too old: " << read.GetSnapshot());
     }
 
diff --git a/ydb/core/tx/columnshard/ut_rw/ut_columnshard_read_write.cpp b/ydb/core/tx/columnshard/ut_rw/ut_columnshard_read_write.cpp
index 2497edbdc403..5ea8edace5e9 100644
--- a/ydb/core/tx/columnshard/ut_rw/ut_columnshard_read_write.cpp
+++ b/ydb/core/tx/columnshard/ut_rw/ut_columnshard_read_write.cpp
@@ -608,6 +608,7 @@ void TestWriteReadLongTxDup() {
 void TestWriteRead(bool reboots, const TestTableDescription& table = {}, TString codec = "") {
     auto csControllerGuard = NKikimr::NYDBTest::TControllers::RegisterCSControllerGuard<TDefaultTestsController>();
     csControllerGuard->DisableBackground(NKikimr::NYDBTest::ICSController::EBackground::Compaction);
+    csControllerGuard->SetReadTimeoutClean(TDuration::Max());
     TTestBasicRuntime runtime;
     TTester::Setup(runtime);